US3440498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contacts for insulation isolated semiconductor integrated circuitry
Assignee: National Semiconductor Corp
•
Filing: 1966-03-14
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Granted: 1969-04-22
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Expires: 1986-03-14
Abstract
No abstract record available.
Inventors
- 👤 Walter B Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:58
CPC Classifications
H; H10; H10D; H10D99/00; H10W; H10W10/00; H10W10/01; H10W10/011; H10W10/019; H10W10/10; H10W20/00; H10W20/20; H10W72/00; H10W72/071; H10W72/075; H10W72/07551; H10W72/07552; H10W72/50; H10W72/521; H10W72/527; H10W72/531; H10W72/536; Y; Y10; Y10S; Y10S148/00; Y10S148/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3189973A
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US3244950A
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US3290753A
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US3341379A
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US3312879A
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US3308354A
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US3341743A
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US3357871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |